Intermediate film for laminated glass and laminated glass

An interlayer film for a laminated glass, the interlayer film comprising:

• a sound insulating layer comprising a polyvinyl acetal X and a plasticizer interposed between two layers of a protective layer comprising a polyvinyl acetal Y and a plasticizer,
• wherein:
• the polyvinyl acetal Y comprises a larger amount of hydroxy groups than the polyvinyl acetal X,
• an amount of the plasticizer in the sound insulating layer based on 100 parts by mass of the polyvinyl acetal X is larger than an amount of the plasticizer in the protective layer based on 100 parts by mass of the polyvinyl acetal Y,
• the interlayer film having minute recesses and minute protrusions on at least one surface thereof,
• the recesses each having a groove shape with a continuous bottom,
• the recesses being formed in a regular manner,
• recesses adjacent to each other being parallel,
• recesses adjacent to each other being spaced 100 to 400 μm apart, and
• the recesses have a groove depth (Rzg) determined in accordance with JIS B-0601 (1994) of 10 to 28 μm,
• wherein a laminated glass comprising the interlayer film interposed between two clear glass plates having 2.5 mm thickness gives a single image or a double image with a separation of within 15 minutes of arc when evaluating ghosting in accordance with JIS R 3212 (2008) with a 10 W silica bulb light source or a 40 W silica bulb light source.